Revert "-add support for ICECAST-style uploads"

This reverts commit 19e1ed8355.

src/include/microhttpd.h

@@ -1503,16 +1503,7 @@ enum MHD_FLAG
    * Flag set to enable TLS 1.3 early data.  This has
    * security implications, be VERY careful when using this.
    */
-  MHD_USE_INSECURE_TLS_EARLY_DATA = 1U << 18,
-
-  /**
-   * Flag set to allow uploads from clients even if the client supplied no
-   * transfer encoding and no Content-length header.  The upload is expected
-   * to be concluded when the client closes the connection.
-   * This is in violation of RFC 7230 but useful for
-   * Icecast. Use at your own risk.
-   */
-  MHD_USE_ICECAST_CLIENT_UPLOADS = 1U << 19
+  MHD_USE_INSECURE_TLS_EARLY_DATA = 1U << 18
 
 };